2023年第47卷第4期20声学基础声学基础cousticsFoundationA文献引用格式:翟宇文,马广彬,田小强,等.PML在声波方程间断有限元计算中的应用[J].电声技术,2023,47(4):20-22.ZHAIYW,MAGB,TIANXQ,etal.Applicationofperfectlymatchedlayerindiscontinuousgalerkinmethodcalculationforacousticequation[J].AudioEngineering,2023,47(4):20-22.中图分类号:P631.4文献标识码:ADOI:10.16311/j.audioe.2023.04.006PML在声波方程间断有限元计算中的应用翟宇文1,马广彬1*,田小强2,董兴蒙1(1.中国电子科技集团公司第二十二研究所,河南新乡453000;2.中国石油集团测井有限公司物资装备公司,重庆401120)摘要:在模拟声波在无限空间中的传播时,标准完美匹配层(PerfectMatchedLayer,PML)对于一阶偏微分方程而言简单直接。将PML引入到二维声波方程的间断有限元计算中,在二维声波一阶方程组中引入PML边界条件,然后将带PML边界的方程组整理成适用于间断Galerkin(DiscontinuousGalerkin,DG)求解的双曲守恒形式,并用DG进行计算。数值结果表明,PML能有效吸收介质中的声波,极大地衰减进入其中的声场能量,实现了良好的吸收效果。关键词:完美匹配层(PML);间断有限元;声波方程ApplicationofPerfectlyMatchedLayerinDiscontinuousGalerkinMethodCalculationforAcousticEquationZHAIYuwen1,MAGuangbin1*,TIANXiaoqiang2,DONGXingmeng1(1.N0.22ResearchInstituteofChinaElectronicsTechnologyGroupCorporation,Xinxiang453000,China;2.CNLCMaterialsandEquipmentCompany,Chongqing401120,China)Abstract:Whensimulatingthepropagationofsoundwavesininfinitespace,thePerfectlyMatchedLayer(PML)issimpleanddirectforthefirst-orderpartialdifferentialequation.Inthispaper,PMLisintroducedintothediscontinuousfiniteelementcalculationoftwo-dimensionalacousticwaveequations,andPMLboundaryconditionsareintroducedintotwo-dimensionalacousticwavefirst-orderequations.Then,theequationswithPMLboundaryaresortedintohyperbolicconservationformssuitableDiscontinuousGalerkin(DG)solution,andcalculatedbyDG.ThenumericalresultsshowthatPMLcaneffectivelyabsorbsoundwavesinthemedium,greatlyattenuatethesoundfieldenergyenteringit,andachievegoodabsorptioneffect.Keywords:PerfectMatchedLayer(PML);discontinuousfini...